Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a3b716f1c97924…

MALICIOUS

PDF

67.6 KB Created: 2021-01-09 17:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7c2558ae2e044cd02a093c36a34c7b SHA-1: 0a9c8b627cf9fb8997a526483c210592b419cc08 SHA-256: 29a3b716f1c97924436bfbe581c2a39955b0aaa0a9ac6d3351af78651fa4ee97
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious due to its structure and embedded links. It contains a large number of external links, with at least one redirecting to known malicious infrastructure. The document body, though heavily obfuscated, suggests a lure related to sheet music, likely to disguise the malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9136

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/aws?utm_term=taz+amnesty+theme+sheet+music
    • https://static.s123-cdn-static.com/uploads/4417986/normal_5ff26143582e4.pdf
    • https://cdn.sqhk.co/nebuneduzib/M2dAwjh/mutawafegudutonaxiz.pdf
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/sewamopitazewumamibe.pdf
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/lelinu.pdf
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5fa3c0bbe1a0c.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fisulefajow/airtel_kyc_app.pdf
    • https://uploads.strikinglycdn.com/files/d5bc2619-087a-44ba-b4be-294a14390ebc/how_to_speak_dovahzul.pdf
    • https://uploads.strikinglycdn.com/files/a3be92aa-3558-4741-8aa1-5573292c2ac6/jamififaxomezosititiveg.pdf
    • https://uploads.strikinglycdn.com/files/71111eca-8f62-4f06-97b8-d8bacf2a2751/auto_parts_48629.pdf
    • https://uploads.strikinglycdn.com/files/41b5373b-1109-4b8f-abcc-ff9031756a66/75468634096.pdf
    • https://uploads.strikinglycdn.com/files/0602d140-1729-46d1-9dff-e8bb7203a154/4748158049.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd30.bin
10c276bd2dc4509147dde621fb0cd573dc388aa14523798f8a7b65cd1864d3b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD30 4784 bytes
font_01_sfnt_off0000dd4e.bin
1c125c712121cb1c8fb2efa1b501ad8cabf1930ff7e72a7529d3bc3d51070a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 15352 bytes

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